摘要
叙述了用“６０１”碳分子筛作托卡马克废气排出气的收集、纯化和低温热色谱的进样单元，以５Ａ分子筛柱在液氮（ＬＮ２）温度下吸附氕、氘，氚，随后把柱温回升至室温（２０℃～３０℃），为了提高分离效率、缩短分离时间和分离柱总长度，在两根分离柱间添加了ＨＤ、ＨＴ等歧化平衡器，经过四根分离柱组成的级联分离柱后氕、氘、氚获得了清晰分离。该装置的单次进样量为５标准升，日处理量为１２０～１８０标准升，流程气体总回收率＞９７％，氘丰度＞９９．９％时，氘、氚损失量（不计加热３００℃活化再生分离柱回收的氘、氚）＜５％，除氕效率＞９８％。
In this paper a cryogenic chromatothermographic method for reprocessing Tokamak exhaust gas is described. The experimental apparatus consists of a column with '601' carbon molecular sieve used as exhaust storing and purification unit, four columns with SA molecular sieve operated at the temperature of liquid nitrogen to adsorb protium, deuterium and tritium and to release them at a raised temperature of 20 - 30 ℃. In oder to raise the efficency and to shorten the total time of isotope separation and the total length of columns between two columns, a disproPOrtionate equilibrator for isotope exchange of HD and HT was inserted. After passing through the cascade columns, the protium, deutorium and tritium are separated cleanly. The processing capacity of this method is 5 standard liters for each treatment and 120 - 180 standard listers Per day in condition of continuous operation. Except the amount recovered when columns are reactived and regenerated at 300℃, the overall recoveries of deuttriun and tritium for cleanup-isotope separation procedure are greater than 97% and the losses are smaller than 5%, and the pr-tium removing efficiency is larger than 98%.
出处
《高技术通讯》
CAS
CSCD
1996年第4期52-56,共5页
Chinese High Technology Letters
基金
863计划资助
关键词
氚
氢同位素分离
低温热色谱
Tritium, Isotope separation, Chromatothermography
